分散剂对ITO前驱物浆料稳定性的影响

Effect of Dispersants on Stability of ITO Precursor Slurry

摘要:

以金属铟和结晶四氯化锡为原料，通过加入各种添加剂制备了稳定的ITO前驱物浆料。利用沉降实验、Zeta电位、透射电镜研究了分散剂对浆料稳定性的影响。通过考察不同pH值条件下，分散剂的种类及用量对ITO浆料稳定性的作用，探究其分散机理。结果表明，在ITO前驱物浆料中加入离子型分散剂乙醇胺，通过乙酸调节pH值，可使颗粒间具有较高静电效应，在此基础上加入高分子表面活性剂（PEG、PVP），使得颗粒间又具有空间位阻效应。从而防止了颗粒间的团聚，可得到高度分散的浆料。前驱物浆料颗粒粒度主要分布在10~20 nm之间。

Abstract:

The stable precursor slurry of indium-tin-oxide (ITO) was prepared using metal In and crystalloid tin tetrachloride as raw materials by adding different additives. The effect of dispersants on the stability of ITO precursor slurry was studied by Zeta potential value, TEM and sediment. The influences of pH value and dispersant content on stability of the slurry were investigated. And the effects of the different dispersant and their dispersing mechanism on the stability of the slurry were also investigated. The results show that a higher electrostatic effect could be obtained by adjusting pH value of medium and adding ionic dispersant. Based on the above mentioned, non-ionic surfactants (PEG, PVP) were added, resulting in creating a steric hindered effect among particles, which prevented the agglomeration of the particles so as to obtain a high dispersed and steady slurry. The particle sizes of the slurry were about 10~20 nm. The following finding can be drawn from the experiment that the optimum contents of dispersants are PEG 10% and monoethanolamine 2.5% (mass fraction).